Narrated by Umar ibn al-Khattāb (may Allah be pleased with him)
أَنَّ رَجُلاً، مِنَ الْيَهُودِ قَالَ لَهُ يَا أَمِيرَ الْمُؤْمِنِينَ، آيَةٌ فِي كِتَابِكُمْ تَقْرَءُونَهَا لَوْ عَلَيْنَا مَعْشَرَ الْيَهُودِ نَزَلَتْ لاَتَّخَذْنَا ذَلِكَ الْيَوْمَ عِيدًا. قَالَ أَىُّ آيَةٍ قَالَ {الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِي وَرَضِيتُ لَكُمُ الإِسْلاَمَ دِينًا}. قَالَ عُمَرُ قَدْ عَرَفْنَا ذَلِكَ الْيَوْمَ وَالْمَكَانَ الَّذِي نَزَلَتْ فِيهِ عَلَى النَّبِيِّ صلى الله عليه وسلم وَهُوَ قَائِمٌ بِعَرَفَةَ يَوْمَ جُمُعَةٍ.
A man from the Jews said to him: O Commander of the Believers, there is a verse in your Book; had it been sent down to us, the community of Jews, we would have taken this day as a festival. He said: Which verse? He said: {Today I have perfected your religion for you, completed My favor upon you, and have chosen Islam as your religion.} [Surat al-Mā’idah: 3]. ‘Umar said: Indeed, we know that day and the place where it was revealed to the Prophet (ﷺ) while he was standing at ‘Arafah on a Friday.